Liquid-fuel burner



I; SMITH. LIQUID I'UIEL` BURNER. APPLlcAloN FILED MAR. 11, 1922.

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Patented Sept. 19, 1922.

JAMES SMITH, 0F GLASGOW, SCOTLAND.

LIQUID-,rum BURNER.

Application filed March' 17, 1922. Serial No. 544,539.'

To all whom t may concern.'

Be it known that' I, `JAMES SMITH, of 120 Salkeld Street, Glasgow, Scotland, a sub ject of the King' of (rreat Britain, have invented certain new and useful Improvements in Liquid-'Fuel Burners, of which the following is a specification.

This invention relates to that type of liquid fuel burner havingaperforated plate, or plates, over the exterior surfaceof which the liquid fuel is distributed in a film, or layer, where it is subjectedtofthe'comminuting energy of jets of air or steam, or both (hereinafter termed they comminuting agent) issuing through the perforations in the plate, or plates.v f

' I have found that the heating capacity of such a burneras previously proposed cannot be easily regulated by means of the usual control cocks, except within very confined limits, without' seriouslyv impair-ing the efliciency of the burner and rendering it economically unsuitable vfor many purposes. For example, when such a.burneriseinployed for firing a steam generatoror boiler, considerable waste of fuel is likely to occur in starting up the burner and when the boiler' is running light or without load owing` to the difficulty of regulating theproportions of fuel and the comminuting agent to obtainV proper combustion simultaneously vwith the required reduction in the heating capacity.

The principal object of my present invention is to obviate this disadvantage and to the attainment of this end the inventionv consists in an improved burner of the type stated, wherein the burner is divided to form separate portions each having its own supply of fuel and ofthe comminuting agent,

so that said por-tions can be made to operatey conjointly or separately, asrequired, and re.

duction in the heating capacity of the burner can be obtained simply by shutting off one or more portions without having to regulate the supply of fuel 4and of the comminuting` agent to the portion, or portions, remaining in operation.

In carrying the invention` into practice.

steam to each chamber and fuel to the eX- terior surface of eachportion ofthe vperforated wall,y or walls. 'y

Various constructional forms 0f the improved burner V'are illustrated', by way of example, -on' the accompanying drawing, to ,whichA reference will now be made and whereomy Fig. 1 is anend view and'Fig. 2 across section of one form of the burner having an inclined burnerplate. j

y Figs? 3 and are sectional elevation and plan views of another form of burner 'having` a flat burner plateQ` l F ig. y5 is an elevation` andF ig. "6 a corre-v sponding Icrossi section of lanotherfform of the burnerfhaving a ridged'bu'rner plate.

' 1 indicates'the burnerbox' or casing hav- 4 mga fiat, 1ncl1ned,conveX or ridged cover which jet'sfor'streams of air, 'or steam,` -orv both are forced into the fuel.' 5 denotes a vridge formed lon the lower or outer edge of the-burner plate to prevent liquidfuel overflowing and G'is a pipe for Areturning surplus fuel to thefsource of yfuel supply. v

Thev forni yof burner illustrated by Figs.,

1` and 2 is particularly suitable for attachment to the firedOOr, yor. for 'locationi'n the redoo'r opening, of a furnace; 'It is trianf gular in cross-section, j'o'refsentingl an in-` clined burner plate 2, "and'lias a vpartition l'7 l dividing itl horizontally into' two-portions or compartments 8, 9,"to which the commi-I nuting agent is -separately supplied by pipes i IO, 10a. "Liquid fuel is' suppliedto' the eX- terior' surface of rthe perforated burner plate1 by way of-*pipesY 11, 1I and l2,

and nozzles x13, 13, one set of pipes and nozzlesy being 'provided for leach portion of the burner andfthefnoz'zle's being located on ,the burner plate at' height corresponding f tothe top' of f the respective compartment 8 or 9.' Y By vthe p'ro'perfma` nipul'ation of control cocks" 14`1' 5',an`d 14a,

l5, supplies of liquid fuel and of thecomn'iin'uting agent can bev made to'fone'orboth portions of the burner as required. One

portion of the burner, say, the lower por-I tion, is used for starting iup' and running light or without load,f-Vand vthe-other:por-

portions of the burner.

Figs. 3 and 4v show a circular form of burner specially adapted for use in cupolas and 'other furnaces for heating and melting metals. In this f'orm, the partition 7 subdividing the casing 1 is cup-shaped and the pipe 11 supplies fuel to the annular portion 8 by way of an annular recess 16 in the bottom of the burner and thence by a ring of nozzle pipes 13 to the flat burner plate 2. Similarly the pipe 11a for supplying fuel to the inner portion 9 of the burner communi cates with a 'ring pipe 12 and an inner ring of nozzles 13a. Channels 17 (Fig. 4) are shown cut in the burner plate leading from the fuel nozzle outlets 13 and 131 to the adjacent perforations 3 in the plate. Control cocks 14, 15a, and 14, l5, are provided as before to enable one or both portions of the burner to be used as required.

The 'oblong form of burner illustrated by Figs. 5 and 6 is particularly suitable for` use in the firespace of a marine boiler. In this form the cover or burner plate 2 is ridged longitudinally after the manner of a roof (F 6).l The partitions 7, subdividing the casing is channel shaped and two fuel nozzle pipes 12a, 12, are provided for the portion 9.

When air is used as the comminuting agent in the'improved burner described, the blast may be obtained/by an ordinary blower or fan or a pump, and I may arrange that the air drawn in by the same passes over or through the fuel in the fuel tank and be` comes charged more or less with fuel vapor on its passage to the burner casing. rlfhe air and the fuel may be heated in any convenient manner before being passed to 'the burner.

To assist the even distribution of the liquid fuel over `the burner plate, lf prefer to cover the eXteri'or surface of the plate with gauze.

Having noW fully described my invention What I claim and desire to secure by Letters Patent is j 1. A liquid fuel burner comprising a casl ing having a perforated Wall, means dividing the casing to form separate compartments to which said Wall is common, means for distributing liquid fuel independently over the exterior surface of the perforated Wall of each compartment, and means for supplying a suitable comminuting agent to each compartment independently.

2. A liquid fuel burner comprising a casing having a perforated Wall, means dividing the casing to form separate compartments to Which said Wall is common, means for distributing liquid fuel independently 7o over the exterior surface of the perforated Wall of each compartment, means f'or supplying a suitable comminuting agent to each compartment independently, and means for returning surplus fuel from the perforated Wall to the fuel supply.

3. A liquid fuel burner comprising a casing having an inclined perforated Wall, means for distributing the fuel in a film over the exterior surface of the perforated Wall, and means dividing the casing to form separate compartments for the supply of fuel and of the comminuting agent.

4. A liquid fuel burner comprising a case ing having a detachable perforated burner plate, a partition dividing the casing into separate compartments, a fuel distributing pipe in each compartment communicating through perforations in the plate With the exterior surface thereof, and means for supplying a suitable comminuting agent tol each compartment independently.

5. A liquid fuel burner comprising a casing having a detachable perforated burner plate, a partition dividing the casing into separate compartments, a fuelv distributing pipe in eachv compartment communicating through perforations in the plate With the exterior surface thereof, means for supplying a suitable comminuting agent to each compartment independently, and means for controlling the supply of fuel and of the comminuting agent to each compartment independently.

G. A liquid fuel burner comprising a casing having a perforated Wall, nozzles projecting above the exterior surface of the wall, means for distributing liquid fuel over the exterior surface of the perforated Wall, and means dividing the casing to form separate compartments for the supply of a suitable comminuting agent.

r1'. A liquid fuel burner comprising a casing having an inclined perforated Wall, nozzles projecting above the exterior surface of the Wall, means dividing the casing to form separate compartments to Which said Wall is common, means for distributing liquidl fuel independently over the exterior surface of the perforated Wall of each compartment, and means for supplying a suitable comminuting 'agent to each compartment independently.

8. A liquid fuel burner comprising a casing having a detachable perforated burner plate, nozzles projecting above the exterior surface of the plate, a partition dividing the casing into separate compartments, a fuel distributing pipe in each compartment coinmunicating through perforations in the plate with the exterior surface thereof, and means for supplying a suitable eomminuting agent to each compartment independently.

9. A liquid fuel burner comprising a cas.-`

ing having a detachable perforated burner plate, nozzles projecting. above the exterior surface of the'plate; a partition dividing the casing into separate compartments, a fuel distributing pipe in each Acompartment communieating through perforations in the plate with the exterior surface thereof, means for supplying a suitable eomminuting; agent to each compartmentindependently, and means for controlling the supply of fuel and of the agent to each Compartment 15 y i independent y;

eomminutin In testimony whereof .I affix my signature in presence of two Witnesses. 1 I

JAMES SMITH. Witnesses:

STANLEY DUNLOP, WALTER GEORGE PEARSON. 

